Specifications:New generation of bluetooth-compatible 5.0 earphone is connect faster and more stable.Two earphones will automatically pair after taking out from the charging box.The bluetooth-compatible earphone supports play/pause music, switch music, answering/hanging up/rejecting incoming calls/three-way calling and call reminder.It has bluetooth-compatible headset operation voice prompt, ISO system power display and voice assistant function.This earphone support volume adjustment and master-slave switching function.You can connect it to smartphone, notebook, computer and tablet that has bluetooth-compatible module.Type: bluetooth-compatible EarphoneMaterial: PlasticWorking Frequency: 2.402GHz-2.480GHzTransmission Power: CLASS2 3DBTemperature Range: -20 to +70 Degree CelsiusSpeaker Size and Impedance: Diameter 8mm, 32Audio Signal to Noise Ratio S/N: 100dBMicrophone Sensitivity: -38Db2DbMicrophone Mic: 4013 Round MicHeadset Battery: 501015 50mAh Battery (Included)Charging Box Battery: 602030 300mAh Battery (Included)Headset Charging Current/Voltage: 60mA/DC 4.8-5.3VHeadset Charging Time: about 1 HourCharging Time of Charging Box: about 2 HoursTransmission Distance: 10 MetersTalk Time: about 5 HoursSong Listening Time: about 5 HoursWorking Current: 12mAStandby Time: about 70h (Theoretical Value)Charging Port: USBEarphone Size: 22.5mm x 16mm x 24mm/0.89" x 0.63" x 0.94" (Approx.)Charging Box Size: 69mm x 30mm x 29mm/2.72" x 1.18" x 1.14" (Approx.)Notes:Due to the light and screen setting difference, the item& 39;s color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 Pair of Earphones(with Charging Box)2 Pairs of Ear Caps(Large+Small)1 x Charging Cable1 x User Manual